Professional Formulas - Thuja occidentalis - 8.4 FL. OZ. (250 mL). Serving Size:One Teaspoon (4.9 mL) Active Ingredients: Thuja occidentalis Leaf Extract (1:1) 4.9mL Other Ingredients:Grain alcohol (44%) and purified water. Botanical Name: Thuja occidentalis Leaf 1:1 Vegetarian Formula Gluten Free Hypoallergenic- Professional Formulas - Thuja occidentalis - 8.4 FL. OZ. (250 mL).